Fix crash on quit due to still accepting new connections while we are already shutting down.
Fix crash on quit due to still accepting new connections while we are
already shutting down.

svn path=/trunk/kdesupport/akonadi/; revision=919962

kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi